Composite electric system.



A. D. T. LIB-BY.

COMPOSITE ELECTRIC SYSTEM.

APPLICATION FILED JAN- 28. 1910.

1,137,151 v Pame a Apr. 27, 19 15.

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ht ented Apr. 27, 1915.

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comrcsfln ELECTRIC SYSTEM. 1,137,151. 7 n ifi fl n a: we wen Patented Apr. 27,1915.

Application filed January 28, 1910. Serial No. 540,572.

To all whom it may concern Be it known that I',"ALBION D. T. LIBBY,- a citizen of the United States, residing at lyria, in the county of Lorain'and State of '0, havejinvented certainnew and use- 111 I Improvements in Composite Electric Systems; and I do hereby declare the folserved by an attendant.

etc from the main station.

lowing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

y invention relates to a combined police and telephone system, and has for its principal object the improvement of the systems isclosed in companion applications now pending in the United States Patent Office. In the systems of this application I have produced a combination of apparatus. in which I may operate lamp signals at the substations over the conductors which are used for telephone purposes, thus reducing the number of conductors.

other objects of my invention will be clear from the particular description which is to follow, and my invention will be best understood therefrom when taken in connection with the accompanying illustrations showing specific embodiments of such invention, while its scope will be more particularly pointed out in the appended claims.

Figure 1 is a diagramillustrating the prefen-ed form of my invention. Fig. 2 is a diagram of a modification. Fig. 3 is a dia- .-gram of a second modification. Fig. 4 is a diagram of a third modification.

eferring now to Fig. l, I have shown a combined telephone and police system employing the metallic conductors 1 and 2. I also use a third conductor which is here siown as ground. I may employ a metallic conductor in place of ground or may interchange one of the metallic conductors with the ground. At A I. show the apparatus which isused at the principal police station, which Ishall designate as the main station, and which apparatus is A number of these police lines radi I have illustrated one of these leading to two pat-rolmens boxes, or substations C and D. At the substations I show, telephone instruments consisting of a transmitter .T, a receiver S in bridge of the line; a high wound polarized relay R permanently combined telephone and lows bridged across the line; a lamp Lwhich is 7 adapted to be connected in a bridge across the telephone line; a police signal sending device from a differential point relay R and a grounded key N m the same leg. At the central station I show a relay R? grounded from the difierential point in a bridge of the line, This relaycontrols the circuit of the register relay R which in turn controls the police signal receiving and registering device This register is not shown in detail, being the same as that illustrated in a previous application filed by me and being now well known. At R I show a relay which controls the connection of the lamp operating battery to the Col ductors 1 and 2. At R I show another re ay which controls the automatic disconnection of. said source from said line. L is a pilot lamp which is used to indicate the condition of the lamps at the substations. 2 is a key for normally interrupting the circuit of the relay B when the automatic means is not operated. K is a key for completing a circuit through the relay R which relay afterwards locks itself upon a is a key. for bridging the attendants telephone set upon the telephone line. 1 is a line signal which is used to indicate the call of the substation for the attendant. 'R is a relay which controls this signal and which is energized from a substation over the conductors of the system.

" he apparatus and the functions thereof of the polarized ductor legged to ground second circuit. K

description of the operation which is as fol- Suppose a patrolman desires to call the attention of the attendzint operator to the telephone circuit. He removes his receiver S-from the hook H which moves to close the switch H-3. This closes a circuit as follows: HT-S-2$-'56-7-8-9-battery -Brelay R 101112 13-l4- 15.13. This energizes the relay R which attracts the armature 16, closing the switch 16-17 and lighting the lamp L Having noticed this, the attendant operates the switch K which opens the-switches 11l2 and 78, closing the "switches 1218 and 7-19, bridging his set upon the system over the leads 20 and 21. The circuit of the relay R is broken and the lamp extinguished. Suppose that the system be a normal condition and that the attendant desires to .call

.inatures 4 and 1.) breaks the across the line.

He operates the follows: battery a patrolman on the beat. key K, closing a circuit as B -9-22 .-h'.-23f-'-rela R-24-.-back to battery. This energizes which pulls up its armatures 4, and 25. The armature 25 closes the switch 25- 26 and locks the relay R upon the following circuit: battery B-9--K'-'-27-2829-2625 19 24 back to battery. The attraction of the arline circuit and bridges the battery B tliei'eacross. The relays'lt are operated and close the lamp bridges over the following circuit: battery 13 -31--4--232-R--1-15-30 -R-back to battery B. The energization of these relays causes an attraction of their armatures, closing the switch till-34] in the lam bridges, and 35-36 in shunts about suc lamps. These shunts are still open at 37- 38. 'l he lamps are lighted from the battery 13 over the circuits traced for the relay R, except that the current passes through the lamp bridges for the purpose of operating the lamps. It will thus be seen that I both control and operate the lamps over the condoctors 1 and The lamps are placed in iron b'oxcs along the beats of the patrolman. Lenses are placed in the surfaces of these boxes. The light radiating through these lenses forms an attractive signal which can be seen from a great distance. 'The-attention of the patrolman having been attracted, he proceeds to the box, opens the same, and takes his receiver from they hook. The spring pressed hook moves to close the switch ]l-3, but before the switch is closed. and before the telephone instrument is placed in bridge of the conductors, the rising hook closes a llash switch Ell-38. The closure of this switch shunts the lamp L and the relay R making a low resistance bridge As long as the resistance of the lamps L and the relay B were in the circuitof relay R the current from battery B was insuilicient to operate the same. The interposition of the low resistance shunt 40 allows enoughcurrent to llow through It to operate the same. llelay R pulls up its armature 29, breaking the circuit of relay R at 28- 19. Relay ll being deenergizcd, the armaturcs 4, 15 and 25 return to their normal positions as shown in the drawing.

' lamps extinguished use the' tele This interrupts thelocking circuit of R and disconnects the lighting source B from the line conductors, This, source hating been removed, the relays R are delinergized, the and the shunt 40 broken at 35--36. The book switch passes on over closing switch "-3, when tele hone conversation may be carried on over tie'eircuit reviously described. I have thus produce a system in which I hone conductors for lighting purposes an in which the source of ii liting current is automatically disconnectef from between the o ration of the amps and 'lay R pulls up the line by the operation of the hook switch at the substation and is disconnected before I the telephone instruments are the line. I thus revent an interfereiifie e telephoning. 0 send in a police signal such as are generall sent the signal sen ing apparatus E is operated by the patrolman which acts to make and break the circuit from ground G=-E-4 1- relay R--through the two parts of this winding in parallel -to the conductors 1 and 2-throu h the parts of the shunt 32, in parallel-4: rough the conductors 1 and2 cut in upon in at certain intervals,

in parallelthrough the parts of a bridge 42 at the main station-through the two resistance coils V therein to a neutral point, the leg 43the relay R -battery B-to ground l. The resistances of the coils V, V are so reat that neither the telephone nor the amp controlling nor operating currents s therethrough. The resistance of the ings of the relay R is so reat that at lamp bridges have been c osed, only cu enough passes therethrongh to hold up armatures, the major part of the Curr-c; ing diverted through the lamps. switches N are for the purpose of scndin special signal to the police signal receiving apparatus at the main station, and operate over substantially the same circuit as that which is described. In other words, the reits armature 45, closing the switch 441-46 inathe circuit of the register relay R which operates the register mechanism. The relay R will not operate through the bridges of the resistance device V, V nor through the relays B, not enough current llowim thcrethrough to operatethis relay. The i'dl'ay R", however, is capable of operat ing through the combined resistance of R pedancecoils 100, and the threebridged l across the'linc at each substation. The im pedaiu-e'coils 1-00 serve to prevent the passage of roice ciiri'entsthi'ougli the bridges, the condensers 0 serving to permit the passage of alternating barring the passage The police signal sending apparatus E and th special police signal sending switch N currents at, the same time of continuous currents.

are connected substantially the same as in Fig. 1, and are legged .to ground from the conductor 2. \ided for. the operatioii'of the line signa at the main station, the control of this signal being removed from the telephone set. The circuit of this is traced from M-through 1 15--14-13l2-11-relay R--battery B-to ground G. At the substation "the Special switches M are pro-' 75 to a point in the center of the winding of the relay R.

13 -150 ground. The current is furnished which and automatically disconnected by-relay R when response is -made at a substation.

This arrangement and the operation thereof is substantially the same as shown in Fig.

1, and the description need not be repeated ere.

In the modification shown in Fig. 3 I provide a special line signaling circuit for calling the main station attendant from the substations. This consists in the switches M and the conductor 101. The lamps at the substations are bridged across the line with a retardation coil C, C on each side thereof. These coils Serve two functions: first, they balance the lamps; that is, their resistance may be changed to compensate for the re sistance in the lines which iscaused by the nearness or remoteness of the lamps to the source or, operating current; and second, they serve to retard the voice currents, preventing their flow through these bridges. The police signal sending apparatus E and the special signal sending apparatus N are legged from the center point of these coils I to ground. The police signal sending circuit operates over the conductors 1 and 2 in phantom which, in this case, means that they operate in multiple over these conductors and return through. ground. In the circuit of the battery B which furnishes the lamp signal operating current I place a galvanomto indicate the amount of current flowing through evidence of the number of lamps upon the circuit in operative condition. In this circuit no automatic means is provided for disconnecting the lamp operating source,

the system depending upon the patrolmans pressing the-button to signal the attend ant that he is about to respond. The attendant then manually disconnects the source.

In Fig. 4 I show inplace of the galvanometer I a lamp L shunted by a low resistance V for the same purpose. In this circuitI show an armature .102 for the line his armature is one of the elements of switch 102-103 in the circuit of the lamp signal operating source. When the patrolmanoperates the key M in response to the signal, the relay R is energized inter rupting the circuits ing it from the line. The operator observing the signal L opens the switch K and restores the line connection through to the key K. v I 1 In these circuits I have produced in a combined police and telephone system,

the lamp circuit which is' of this source and tak-- among other things, a Q-metallic conductor system over" which telephoning, police signaling from the substations tothe attendant station and signaling from the attendant station to the patrolmans beat maybe accomplished without interference anmng the various currents which are necessary transmission of these various forms of communication; Thepilot lamps also serve the purpose of notifying the operator that response has been made at a called station should the line lamp fail to accomplish this have shown thfi particular embodimerits of my invention, as they very clearly illustrate the same, but I do not wish to be limited to these forms. It will be obvious to those skilled in the art that numerous and extensive departures from them and the details of the apparatus 'made without departing from the spirit of this invention. Th invention which I claim is more especially pointed out in th appended claims.

I claim: 1. In a comp'osite'system consisting of a here shown-may be e particular scope of the.

combined police and telephone system, the

combination of amain rality of substations, conductors connecting said stations, telephone instruments connected to two of said conductors and adapted to be operated thereover, non-inductive tions, said lamps in circuit with said telephone conductors, said lamps operating thereover, a source of current adapted in circuit with said telephone conductors to actuate said signals and means for automatically disconnecting said source whe response is made at-a signaled substation.

In a composite system consisting of a combined police and telephone system, the

combination of a main station and a plurality of substations, conductors connecting said stations, telephone instruments con-- nected' to' two of said conductors and'adapted to be operated thereover, lamp signals at said substations,.means for connecting said lamps in circuit with said telephone conductorsfsaid lamps operating thereover, a source of current, means for connecting said source in circuit with said telephone lines and said signals, and means for automatically interrupting sponse is made at asignaled means operating before the telephone at that station is connected in circuit with said conductors.

3. In a composite system consisting of a combined police and telephone system, the combination of a main station and a plu rality of substations. conductorsconnecting said' stations, telephone instruments connected to two of said conductors and adapted to be operated thereover, lamp signals at.

said connection when restation, said station and a pin 1 low-resistance lamp signals at said substanon-inductive means for connecting n to be connected nals, and means source from said conductors before the tele lamp signals,

said shunt when response is 'combined telephone and police system,

"means for connecting said source in circu t with said telephone conductors and said sigfor disconnecting said phone instrument at a substation is com nected in circuit therewith.

4. In a composite system, consisting of av combined police and telephone system, the combination of a main station and a plurality of substations, conductors connecting said stations, telephone instruments at said substations connected to two of said conductors, lamp signals at said substations, a source of current adapted to operate said means for connecting said source-in circuit with said telephone conductors, a normally open shunt of said conductors and means to automatically close made at a signaled substation, the closure of said shunt occurring before the tele connected to the line an disconnection of said source ductors.

5. In a composite system consisting ofla t ie combination bf a main station, a plurality of substations, conductors connecting said stations, telephone instruments operating over a pair of said conductors, a police signaling system operating in phantom over said conductors and low resistance, non-inducti've lamp signals at' said substations adapted to be connected in circuit with said telephone conductors and to be operated thereover. I

6. In a composite system consisting of a combined telephone and police system, the combination of a main station, a plurality operating to cause from said con- 1 of substations, ccmluctors connecting said stations, telephone instruments utilizing two of said conductors, a police signaling apparatus operating over said telephone conductors, means to prevent interference between said telephone and police signal transmission over said conductors whereby telephoning and police signaling'may occur simultaneously, lamp signals at the substations adapted to be 0 'erated over said telephone conductors, an means for connecting said signals in circuit 7. In a composite system consisting of a combinedtelephone and police system, the combination of a main station, a plurality of substation conductors connectin said stations, tclep one instruments utilizing two of a' police signaling apparatus operating 'over said telephone conductors, means to prevent interference between said telephone and police signal transmis sion over said conductors whereby telephom 'mcans to prevent the stations, telephone instruments over certain of said condnctors,pol1ce sighone instrument is with said conductors.

ing and police signaling ma v occur simultaneously, lamp signals at the substations adapted to be operated over said telephone conductors, menus nals in circuit with said ciinductors", and

tion of said lamp signals and said telephone instruments to said telephone conductors.

8. In a comp'ositcsystcm consisting of combined telephone and police combination of a main station, a plurality of substations, conductors connecting said naling instruments operating over certain of said conductors, and lowresistance, noninductive lamp signals at said substations, a non-inductive circuit therefor, one of said system, the i for connecting-said sigsimultaneous co'nnecoperating conductors common to said telephone, police I signaling and lamp signal circuits.

9. In a composite system consisting of a combined telephone and police system, the combination of a main station, a plurality of substations, conductors connecting said stations, telephone instruments 0 crating over certain of said conductors, police signaling instruments operating conductors, lam signals at said substations, a circuit there or, one of said coliductors common to said telephone, police signaling and lamp signal circuits, and means to prevent interference among the transmission over said several circuits.

10. In a composite system consisting of a combined police and telephone system, the combination of a main station, a plurality of substations, apsir of conductors connecting said stations, said substations adapted to be-ccnnected inbridge of said conductors and to operate them-cover, police signaling apparatus for sending signals to the main statio'n operating over said conductors in multiple, lamp signals at said substations, andmcanscontrolling said signals connected to-be operated over said conductors.

over certain of said telephone instruments at v v 11. In a composite system consisting of a combined police and telephone system, the combination of a main station, a plurality of substations, apair ct conductors connecting said stations, telephone instruments at said substations adapted tobe connected in bridge of said conductors and to operate thereover, police signaling apparatus for sending signals to the main station operating over said conductors in multiple, lamp signals at said'substations adapted to .be

operated over .said conductors, and means ing said stations, telephone instrum to at said substations bridge of said conch thereoi'er, police si sending signals to Eng over said COT signals at said 5 connected to said current and means to circuit with said lam 18. In a composite consisting of a combined police and one s stem, the combination of a main st axon and a plurality of substations, a pair of conductors connecting said stations, telephone instruments ada otecl to be connected in bridge of 3 connected in and to operate apparatus for station operatnultiple lamp adapted to be s. a source of said source in said line, police signal sending and receiving apparatus adapted to operate over said c0ncluctors in multiple, lamp signals at the sub stations adapted to be operated over said can dUCtOZS, zind ineans to prevent the simultaneous connection of said telephone instruments and said lamp signals to said ccnductors.

In testimony whereof I aflix my sign in presence of two Witnesses.

A. D. T. LIEBY.

Witnesses F. O. RICHEY, Jos. J. MIZER. 

